Crucible



June 12, 1928.

E. L. HAUMAN y GRUCIBLE h Filed Nov. 131926 2. sheets-sheet 2 PatentedJune 12, 1928.

uNrr-ED STATES nant. I.. mom, or menne, NEW Yonx.

ORUCIBLE.

Application filed November 13, 1928. Serial No. 148,274.

This invention relates to a refractory crucible provided with a separate-lip and adapted to be mounted in a furnacasuch as, for example, thosecommonly employedin the brass melting industry.

Heretofore the pots of crucibles have been provided with integral lipswhich is objectionable because the lips are liable to become cracked orbroken oil either in the process ot manufacture, or while packing andshipping the same, but principally while the same are in actual use inthe heating furnace, inasmuch as any shrinkage of the supporting partsof the Crucible throws the strain on the lip which is-cemented into thelining of the furnace wall and therefore is substantially rigid so thatany slight shifting of the crucible body or pot and the lip relativelyto each other will result in breaking the lip.

It is the object of this invention to provide the pot or body of aCrucible with a lip which is se arate and distinct from the pot but sofashioned as to' be readily joined to the pot at the time of installingthe crucible in the heating urnace in which the melting is performed.

ln the accompanying drawings:

Figure 1 is a vertical section showing a crucible consisting of aseparate pot and lip connected with each other and mounted in a heatingfurnace in accordance with my in vention. Figure 2 is a top plan view ofthe lip and the pot in dotted lines. Figure 3 is a fragmentary verticallongitudinal section, on'an enlarged scale, of the lip and the adjacentpart of the pot with which it is connected. Figure 4 is a vertical crosssection t-alren on line 4 4 Fig. 3. Figure 5 is a side elevation of thelip. Figure 6 is an-elevation from the inner end thereof. Figure 7 is afragmentary side view of the pot showing the outlet thereot and therecess therein -which receives the supporting tongue ot the lip. lligure8 is a perspective View of the li I)Similar characters of referenceindicate corresponding parts throughout the several views of thedrawings:

The furnace adapted to receive the crucible for melting the contentsthereof may be of any suitable and approved construction, that shown inthe drawings comprising a I bottom 10, side walls 11, a bottom lining12,

a side wall lining 13, and a pedestal 14, arranged on the bottom lining,said walls being usually constructed of metal and said lining'consisting of any well known refractory material.

The numeral 15 represents the pot or body of the crucible of refractorymaterial which rests on the pedestal and is adapted to receive thematerial which is to be meltedby the heat in the furnace.

0n its upper edge the pot is provided with an outlet 16 for the moltencontents, which outlet in the preferred construction has the form of adownwardly curved notch or recess which is slightly less andsubstantially of semi-circular form.

Arranged in line with the outlet of the pot is a lip 17 which is oftrough shaped form, the cross section of the same being struck from aradius slightly greater than the radius of the substantiallysemi-circularoutlet of the pot. This lip against the outer side of thepot around the outlet thereof so that the bottom of the outlet isslightly above the bottom of the trough in the lip. By this means anytendency of the molten material to leak through the joint between thepot and lip is prevented lnasmuch as the molten material during theoperation of pouring the same from the pot to the lip will jump :fromthe high bottom part of the outlet to the low bottom part of the troughin the lip without any tendency of the material dowing backwardlythrough the joint between the pot and lip.

As a further precaution against leakage between the pot and lip the`ioint between the same is sealed with cement which also aids inconnecting the lip and ot.

rl`he lip may be so mounted t at it receives its support wholly from thewall and lining of the furnace by extending the outer part of the lipthrough an opening 18 in the wall and lining, as shown in Fig. l. lt ispreferable, however` to additionally support the lip on the pot byproviding the inner end of the lip below its trough with an inwardlyprojecting tongue 20 which engages with a groove or recess 21 formed inthe exterior of the pot below its outlet, as shown in Figs. 1. 3 and d.As an additional means ot re-4 taining the lip in place the same may beconnected by plastic cement with the pot, as shown at u19. A separate ordetached lip connected with the pot or body and supported on the furnacein the manner shown and described possesses no inherent lrigidity at thepoint of contact between the pot and fits at its inner and A ,/with saidoutlet and has its bottom arranged slightly below the lower part of saidoutlets.

2. A Crucible comprising a pot provided at its upper end with an outletand also provided on its exterior below said outlet with a recess, and alip arranged in line with Said outlet and having a tongue engaging withsa id recess.

3. A Crucible comprising a pot provided in its upper edge with asubstantially semi-cir cular outlet and arecess on the exterior of saidpot below. said outlet, and a lip which is trough shaped'in crosssection and arranged in line with said outlet and provided on the lowerpart of its inner end witha.v tongue which engages with said recess.

4. A Crucible comprising a pot provided in its upper edge with asubstantially semi-cir cular outlet and a recess on the exterior of saidpot below said outlet7 and a lip which is trough shaped in Cross sectionand arranged in line with said outlet and provided on the lower part ofits uinner end with a tongue which engages with said recess, the lowerpart of said outlet being arranged slightly above the bottom of saidlip.

5. A Crucible comprising a pot. provided at its upper end with an outletand also pro-v vided on its exterior below said outlet with a recess,and a lip arranged in line with Said outlet and having a tongueengagingwith said recess, and said lip and pot being vunited by Cement.

In testimony whereof I hereby aiix my signature.

EARL L. HAUMAN.

